/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

#include "../../Application/jucer_Headers.h"
#include "jucer_PaintElementImage.h"

PaintElementImage::PaintElementImage (PaintRoutine* pr)
    : PaintElement (pr, "Image"),
      opacity (1.0),
      mode (stretched)
{
}

PaintElementImage::~PaintElementImage() {}

const Drawable* PaintElementImage::getDrawable()
{
    if (JucerDocument* const document = getDocument())
        return document->getResources().getDrawable (resourceName);

    return nullptr;
}

void PaintElementImage::draw (Graphics& g, const ComponentLayout* layout, const Rectangle<int>& parentArea)
{
    const Rectangle<int> r (position.getRectangle (parentArea, layout));

    if (const Drawable* const image = getDrawable())
    {
        image->drawWithin (g, r.toFloat(),
                           mode == stretched ? RectanglePlacement::stretchToFit
                                             : (mode == proportionalReducingOnly ? (RectanglePlacement::centred | RectanglePlacement::onlyReduceInSize)
                                                                                 : RectanglePlacement::centred),
                           (float) opacity);
    }
    else
    {
        g.setColour (Colours::grey.withAlpha (0.5f));
        g.fillRect (r);

        g.setColour (Colours::black);
        g.drawText ("(image missing)",
                    r.getX(), r.getY(), r.getWidth(), r.getHeight(),
                    Justification::centred, true);
    }
}

//==============================================================================
void PaintElementImage::getEditableProperties (Array <PropertyComponent*>& props, bool multipleSelected)
{
    PaintElement::getEditableProperties (props, multipleSelected);

    props.add (new ImageElementResourceProperty (this));
    props.add (new StretchModeProperty (this));
    props.add (new OpacityProperty (this));
    props.add (new ResetSizeProperty (this));
}

void PaintElementImage::fillInGeneratedCode (GeneratedCode& code, String& paintMethodCode)
{
    if (opacity > 0)
    {
        String x, y, w, h, r;
        positionToCode (position, getDocument()->getComponentLayout(), x, y, w, h);
        r << "{\n"
          << "    int x = " << x << ", y = " << y << ", width = " << w << ", height = " << h << ";\n"
          << "    //[UserPaintCustomArguments] Customize the painting arguments here..\n"
          << customPaintCode
          << "    //[/UserPaintCustomArguments]\n";

        if (dynamic_cast<const DrawableImage*> (getDrawable()))
        {
            const String imageVariable ("cachedImage_" + resourceName.replace ("::", "_") + "_" + String (code.getUniqueSuffix()));

            code.addImageResourceLoader (imageVariable, resourceName);

            if (opacity >= 254.0 / 255.0)
                r << "    g.setColour (juce::Colours::black);\n";
            else
                r << "    g.setColour (juce::Colours::black.withAlpha (" << CodeHelpers::floatLiteral (opacity, 3) << "));\n";

            if (mode == stretched)
            {
                r << "    g.drawImage (" << imageVariable << ",\n"
                  << "                 x, y, width, height,\n"
                  << "                 0, 0, " << imageVariable << ".getWidth(), " << imageVariable << ".getHeight());\n";
            }
            else
            {
                r << "    g.drawImageWithin (" << imageVariable << ",\n"
                  << "                       x, y, width, height,\n"
                  << "                       ";

                if (mode == proportionalReducingOnly)
                    r << "juce::RectanglePlacement::centred | juce::RectanglePlacement::onlyReduceInSize";
                else
                    r << "juce::RectanglePlacement::centred";

                r << ",\n"
                  << "                       false);\n";
            }

        }
        else
        {
            if (resourceName.isNotEmpty())
            {
                const String imageVariable ("drawable" + String (code.getUniqueSuffix()));

                code.privateMemberDeclarations
                    << "std::unique_ptr<juce::Drawable> " << imageVariable << ";\n";

                code.constructorCode
                    << imageVariable << " = juce::Drawable::createFromImageData ("
                    << resourceName << ", " << resourceName << "Size);\n";

                code.destructorCode
                    << imageVariable << " = nullptr;\n";

                if (opacity >= 254.0 / 255.0)
                    r << "    g.setColour (juce::Colours::black);\n";
                else
                    r << "    g.setColour (juce::Colours::black.withAlpha (" << CodeHelpers::floatLiteral (opacity, 3) << "));\n";

                r << "    jassert (" << imageVariable << " != nullptr);\n"
                  << "    if (" << imageVariable << " != nullptr)\n"
                  << "        " << imageVariable  << "->drawWithin (g, juce::Rectangle<int> (x, y, width, height).toFloat(),\n"
                  << "    " << String::repeatedString (" ", imageVariable.length() + 18)
                  << (mode == stretched ? "juce::RectanglePlacement::stretchToFit"
                                        : (mode == proportionalReducingOnly ? "juce::RectanglePlacement::centred | juce::RectanglePlacement::onlyReduceInSize"
                                                                            : "juce::RectanglePlacement::centred"))
                  << ", " << CodeHelpers::floatLiteral (opacity, 3) << ");\n";
            }
        }

        r << "}\n\n";

        paintMethodCode += r;
    }
}

void PaintElementImage::applyCustomPaintSnippets (StringArray& snippets)
{
    customPaintCode.clear();

    if (! snippets.isEmpty() && opacity > 0)
    {
        customPaintCode = snippets[0];
        snippets.remove (0);
    }
}

//==============================================================================
PaintElementImage::SetResourceAction::SetResourceAction (PaintElementImage* const element, const String& newResource_)
    : PaintElementUndoableAction <PaintElementImage> (element),
      newResource (newResource_)
{
    oldResource = element->getResource();
}

bool PaintElementImage::SetResourceAction::perform()
{
    showCorrectTab();
    getElement()->setResource (newResource, false);
    return true;
}

bool PaintElementImage::SetResourceAction::undo()
{
    showCorrectTab();
    getElement()->setResource (oldResource, false);
    return true;
}

void PaintElementImage::setResource (const String& newName, const bool undoable)
{
    if (resourceName != newName)
    {
        if (undoable)
        {
            perform (new SetResourceAction (this, newName),
                     "Change image resource");
        }
        else
        {
            resourceName = newName;
            changed();
        }
    }

    repaint();
}

String PaintElementImage::getResource() const
{
    return resourceName;
}

//==============================================================================
PaintElementImage::SetOpacityAction::SetOpacityAction (PaintElementImage* const element, const double newOpacity_)
    : PaintElementUndoableAction <PaintElementImage> (element),
      newOpacity (newOpacity_)
{
    oldOpacity = element->getOpacity();
}

bool PaintElementImage::SetOpacityAction::perform()
{
    showCorrectTab();
    getElement()->setOpacity (newOpacity, false);
    return true;
}

bool PaintElementImage::SetOpacityAction::undo()
{
    showCorrectTab();
    getElement()->setOpacity (oldOpacity, false);
    return true;
}

void PaintElementImage::setOpacity (double newOpacity, const bool undoable)
{
    newOpacity = jlimit (0.0, 1.0, newOpacity);

    if (! approximatelyEqual (opacity, newOpacity))
    {
        if (undoable)
        {
            perform (new SetOpacityAction (this, newOpacity),
                     "Change image opacity");
        }
        else
        {
            opacity = newOpacity;
            changed();
        }
    }
}

double PaintElementImage::getOpacity() const noexcept               { return opacity; }

//==============================================================================
const char* PaintElementImage::getTagName() noexcept         { return "IMAGE"; }

void PaintElementImage::resetToImageSize()
{
    if (const Drawable* const image = getDrawable())
    {
        if (PaintRoutineEditor* ed = dynamic_cast<PaintRoutineEditor*> (getParentComponent()))
        {
            const Rectangle<int> parentArea (ed->getComponentArea());

            Rectangle<int> r (getCurrentBounds (parentArea));
            Rectangle<float> b (image->getDrawableBounds());

            r.setSize ((int) (b.getWidth()  + 0.999f),
                       (int) (b.getHeight() + 0.999f));

            setCurrentBounds (r, parentArea, true);
        }
    }
}

//==============================================================================
PaintElementImage::SetStretchModeAction::SetStretchModeAction (PaintElementImage* const element, const StretchMode newValue_)
    : PaintElementUndoableAction <PaintElementImage> (element),
      newValue (newValue_)
{
    oldValue = element->getStretchMode();
}

bool PaintElementImage::SetStretchModeAction::perform()
{
    showCorrectTab();
    getElement()->setStretchMode (newValue, false);
    return true;
}

bool PaintElementImage::SetStretchModeAction::undo()
{
    showCorrectTab();
    getElement()->setStretchMode (oldValue, false);
    return true;
}

PaintElementImage::StretchMode PaintElementImage::getStretchMode() const noexcept   { return mode; }

void PaintElementImage::setStretchMode (const StretchMode newMode, const bool undoable)
{
    if (mode != newMode)
    {
        if (undoable)
        {
            perform (new SetStretchModeAction (this, newMode),
                     "Change image mode");
        }
        else
        {
            mode = newMode;
            changed();
        }
    }
}

//==============================================================================
XmlElement* PaintElementImage::createXml() const
{
    XmlElement* e = new XmlElement (getTagName());
    position.applyToXml (*e);
    e->setAttribute ("resource", resourceName);
    e->setAttribute ("opacity", opacity);
    e->setAttribute ("mode", (int) mode);

    return e;
}

bool PaintElementImage::loadFromXml (const XmlElement& xml)
{
    if (xml.hasTagName (getTagName()))
    {
        position.restoreFromXml (xml, position);
        resourceName = xml.getStringAttribute ("resource", String());
        opacity = xml.getDoubleAttribute ("opacity", 1.0);
        mode = (StretchMode) xml.getIntAttribute ("mode", (int) stretched);

        repaint();
        return true;
    }

    jassertfalse;
    return false;
}

//==============================================================================
PaintElementImage::ImageElementResourceProperty::ImageElementResourceProperty (PaintElementImage* const e)
    : ImageResourceProperty <PaintElementImage> (e, "image source")
{
}

void PaintElementImage::ImageElementResourceProperty::setResource (const String& newName)
{
    if (element != nullptr)
        element->setResource (newName, true);
}

String PaintElementImage::ImageElementResourceProperty::getResource() const
{
    if (element != nullptr)
        return element->getResource();

    return {};
}


//==============================================================================
PaintElementImage::OpacityProperty::OpacityProperty (PaintElementImage* const e)
    : SliderPropertyComponent ("opacity", 0.0, 1.0, 0.001),
      listener (e)
{
    listener.setPropertyToRefresh (*this);
}

void PaintElementImage::OpacityProperty::setValue (double newValue)
{
    listener.owner->getDocument()->getUndoManager().undoCurrentTransactionOnly();
    listener.owner->setOpacity (newValue, true);
}

double PaintElementImage::OpacityProperty::getValue() const
{
    return listener.owner->getOpacity();
}

PaintElementImage::StretchModeProperty::StretchModeProperty (PaintElementImage* const e)
    : ChoicePropertyComponent ("stretch mode"),
      listener (e)
{
    listener.setPropertyToRefresh (*this);

    choices.add ("Stretched to fit");
    choices.add ("Maintain aspect ratio");
    choices.add ("Maintain aspect ratio, only reduce in size");
}

void PaintElementImage::StretchModeProperty::setIndex (int newIndex)
{
    listener.owner->setStretchMode ((StretchMode) newIndex, true);
}

int PaintElementImage::StretchModeProperty::getIndex() const
{
    return (int) listener.owner->getStretchMode();
}

PaintElementImage::ResetSizeProperty::ResetSizeProperty (PaintElementImage* const e)
    : ButtonPropertyComponent ("reset", false),
      element (e)
{
}

void PaintElementImage::ResetSizeProperty::buttonClicked()
{
    element->resetToImageSize();
}

String PaintElementImage::ResetSizeProperty::getButtonText() const   { return "reset to image size"; }
